Obama, S. Korea 'consult and coordinate' on North's nuclear test

2/12/13 1:28 PM EST

President Obama spoke to South Korea's president on Tuesday morning to "consult and coordinate" the response to North Korea's latest nuclear test, the White House said in a statement.

Obama and Republic of Korea President Lee Myung-bak both "condemned this highly provocative violation of North Korea’s international obligations," the statement said, and agreed to work together and with the United Nations Security Council "to seek a range of measures aimed at impeding North Korea’s nuclear and ballistic missile programs and reducing the risk of proliferation."

Obama also "unequivocally reaffirmed that the United States remains steadfast in its defense commitments to the Republic of Korea, including the extended deterrence offered by the U.S. nuclear umbrella."

As Lee -- who Obama hosted for a State Dinner in late 2011 -- prepares to leave office, Obama also thanked his fellow leader for his work and friendship and pledged to work with President-elect Park Geun-hye.

In a statement early Tuesday morning, Obama denounced North Korea's launch as a "highly provocative act" and promised that "swift and credible action" would be taken.